Dolly-bar



A. J. ELIAS.

DOLLY BAR.

A PLICATION FILED OCT 23,1919. 1,373,606. Patented Apr. 5, 1921.

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I'll, "all Jwucwtom UNITED STATES AMSIH :r. nIlIAs, or EW YO K, a. Y.

DOLLY-BAR.

Specification of Letters Patent.

Patented Apr. 5, 1921.

Application filed October 23, 1919. Serial No. 332,593.

To all whom it may concern: I

Be it known that I, AMsrH J. EL IAs, a citizen of the United States, and residlng at New York,-in the county of New York and State of New York, have invented certain new and useful Improvements in DollyBars, of which the following is a specification, such as will enable those skilled. in the art to which it appertains to make and use the same.

This invention relates to dolly bars or devices of this class used in holding rivets in position in the operation of securing the same in position, and the object of the 1nvention is to provide a device of the class specified which is so constructed as'to permlt of numerous different uses thereof, or to permit of the use of the device for the purpose for which it is intended in inconvenient and out of the way places, such as corners and other angular places, and where the structure of the apparatus which is being riveted will not permit ofthe use of'dolly bars and similar devices as now constructed;

-a further object of the invention being to provide a device of the class described with a member or part which may be connected with the device in a number of different positions and secured in connection with the devicein-the different positions; ast1llfurther object being to provide a device of the class specified with a tensional relief which is designed to take part of the blow or thrust thus relieving the operator of a great amount of the shock in the use of the device; and with these and other objects in view the invention consists in a device of the class and for the purpose specified which is simple in construction and operation and eificientin use.-

The invention is fully disclosed in the following specification, of which the accompanying drawing forms. a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which Figure 1 is a side and sectional view of my improved dolly bar and indicating the method of its use;" I

Fig. 2 an end view of the device as Shown in Fig. 1

Fig. 3 a view looking in the direction of the arrow 3 of Fig. 1 with part of the construction omitted;

Fig. 4 a transverse section on the line 4-4 of'Fig. 1; i

of a rivet.

Fig. 5 a view similar to Fig. 1 showing only a part of the eonstructionand with parts in a different position; and,

Fig. 6 a view similar to Figs. 1 and 5 but showing parts in a different position.

In Fig. l of the drawing I have shown at 10 the body portion of the dolly bar, which is tapered to the end portion '11 thereof, which forms the handle end of the device and the end portion 11 is provided with an en larged head 12, the face of which is provided V with a countersunk aperture 13 adapted to receive the head of a rivet. The end portion 14 of the body 10 is tubular in form or provided with an aperture 15 centrall of the bottom of which is a projecting stu 16,

the side walls of which are concave in form as shown at 17 in Fig. 4 of the drawing. A cylindrical plunger 18 is mounted in the aperture 15, the inner end of which is provided with a projecting stud 19 of the same general form as the stud 16 and the outer end of the plunger is provided with a head 20. The plunger 18 is movable inwardly. and

outwardlythrough the'aperture 15 and is 'guided in this movement by two screws 21.

secured thereto, and which pass through and operate in elongated apertures 22 in the tubular end. portion 14, as clearly shown in Figs. 1 and 3. The plunger 18 normally held in its outermost position by four spiral springs 23 mounted in the aperture 15 and held in position by the concave faces of the studs 16 and 19, as clearly shown in Fig. 4. p The head 20 of the plunger is provided on one side thereof with a projection 24 in which is formed a rectangular aperture 25 arranged at an angle to the axis of the plunger 18, and the outer or top face of the projection 24 is in a plane at right angles to the axis of the aperture 25. i

I also provide a finger bar 26which is approximately rectangular in form in crosssec tion and the outer end of which is beveled as shown at 27 and provided with a countersunk aperture 28 adapted to receive the head The. inner end of the bar 26 is provided with an enlarged head 29, the face of which is at an angle to the axis of (the bar and is adapted to rest on the outer or top face of the projection 24, as clearly shown into the aperture 25 and be retained therein by a pin 31 passed through an aperture 32 in the stud 30 and through similar apertures 33 in the head portion 20 of the plunger 18. The stud 30 is also provided with another aperture 34: arranged at ight angles to the'aperture'32 and through which the pin 31 is also adapted to pass when the bar 26 is in a position at right angles to that shown in Figs. land 5. V

The top face 35 of the head 20 of the plunger 18 is provided with a rectangular aperture 36 of the same form and of the same dimensions as the aperture 25 and in connection with which the stud 30 of the finger bar 26 is adapted to operate, as illustrated in Fig. 6. The head 20 of the plunger is provided'with an aperture 37 which passes centrally through the aperture 36 and through which thepin 31 is adapted to pass in securingthe bar 26, or the stud 30 thereof, in the aperture 36.

From the foregoing it will be seen that the finger bar 26may be secured in connection with the head 20 of the plunger 18 in eight different positions, namely, four different positions with the stud 30 thereof in the aperture 25 and in four other different posi tions with the stud 30 in the aperture 36, and it will also be seen that the end portion 11 of the dolly bar, or the aperture 13 in the head 12 thereof, may be used for the purpose specified. v

In'Fig. 1 of the drawing, I have indicated in dotted lines at 38 the head of arivet and have shown the finger bar 26 bearing on said head, in the operation of holding the rivet in place, while the same is being headed in the usual manner; It will be understood that the top face of the finger bar 26 may be used to hold the rivet in place as well as the top face of the head 20 of the plunger 18, and this is alsotrue when the finger bar 26 is in any of the eight positions above set out, and the beveled face 27, or the aperture 28 there in, may alsobe used for the purpose set forth in any of the numerous positions of the finger bar. 1

In the use of my improved dolly, bar, it will be seen that the blow or thrust thereon in the operation of upsetting the rivet or forming a head thereon, will be taken up or relieved to a great extent by the springs 23,

"it beingunderstood that in the use of the devicethe body portion 10 is moved upon the plunger 18, to a position approximately similar to that indicated in'dottedlines, by the operator. In otherwords the springs 23 are partially compressed and the faces of 'thestuds 16 and 19 are separated to a slight extent," and when the blow or blows strike the plunger 18, or the finger bar 26 thereon, the shock will be taken up by the springs 23 until the adjacent faces of the studs 16 and 19come' together, or abut, at which time the push of the operator will come directly into action.

It willalso be understood that the springs 23 will be of sufficient tension to withstand aportion of the blow or thrust given to the plunger 18 so that the plunger will be moved outwardly by said springs in the manner of a hammer, after the first blow to the plunger has ceased, in other words,in the opera- 'tion of the deviceand with an operator pushing steadily upon the dolly bar, or the body portion 10 thereof, the plunger 18fwill have independent of this push a slight forlimited in this respect, nor to the other de- I tails of construction herein shown and described, and various changes therein and modifications thereof may be made, within the scope of the appended claims, without departing from'the 'spirit of my invention,

or sacrificing its advantages. I

Having fully described my invention, what I claim as new and desire to secure by Letters- Patent, is

1; A device of the class described c'ompris- 'ing a body portion one end of which is tubular in form, a plunger mounted in said tubular'end portion, means for limiting theinward and outward movement of the plunger,

tensional means for normally holding the plunger in its outermost position, and a finger bar detachably connected withsaid plunger.

2. A device of the class describeilcomprising a body portion one end of which is tubular in form, a plunger mounted in said tubular end portion, means for limiting the inward and outward movement of the plunger, tensional means for normally holding the plunger in its outermost position, a finger bar, and means whereby the finger bar may be connected with said plunger in a plurality of different positions. i

3. A levice of the class describedcomprisvided with an aperture, a plunger movably -mounted in said aperture, means forlimit- 'ing a body portion one end of which "is 'protensional means for holding said plunger'm its outermost position, the outer end of said plunger beingprovided with ahead, a finger bar, and means on said finger'bar and in said head wherebysaid finger bar may be connected with said head in a plurality of tdifferent positions.

4:. A device of the class describedcoriiprising a body portion one end of which is provided with an aperture, a spring actuated plunger mounted in said aperture, means for limiting the inward movement of said plun ger, the outer end of said plunger being provided with a head having a plurality of angular apertures arranged at an angle to each other, a finger bar provided with an angular shank adapted to be placed in the angular apertures of the plunger head, and means for securing said finger bar against displacement.

5. A device of the class described comprising a body portion one end of which is provided with an aperture, a spring actuated plunger mounted in said aperture, means for limiting the inward movement of said plunger the outer end of said plunger being provided with a head having a plurality of angular apertures arranged at an angle to each other, a finger bar provided with an angular shank adapted to be placed in the angular apertures of the plunger head, and means for securing said finger bar against displacement, said finger bar being adapted to be mounted in connection with the separate apertures of said head in a plurality of different positions, and the free end portion of said finger bar being provided with a recess adapted to receive the head of a rivet.-

In testimony that I claim the foregoing as my invention I have signed my name in presence of a subscribing witness this 21st day of October, 1919.

AMSIH J. ELIAS. 

